From 9cc63f8bcd560c760d0b12e15bba8f81c86237cf Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 14 Aug 2026 15:43:51 -0700 Subject: Merge branches 'expcb.2026.07.24a', 'misc.2026.07.30a', 'rcu-tasks.2026.07.30a', 'srcu.2026.08.11a' and 'torture.2026.08.14a' into HEAD Changes: Make expedited grace periods expedite normal RCU callbacks Miscellaneous fixes: * Improve diagnostic output with character task states. * Mark accesses to inform KCSAN of concurrency design. * Move from kmalloc() to kmalloc_obj(). * Documentation updates. * Improve handling of RCU deferred quiescent states. * Clean up unused function arguments and structure fields. * Reduce show_rcu_gp_kthreads() stack space. Tasks RCU updates: * Clean up after SRCU re-implementation of Tasks Trace RCU. * Mark accesses to inform KCSAN of concurrency design. * Add ->lazy_timer status to diagnostic output. * Remove an unnecessary memory barrier. * Fix a data race, courtesy of KCSAN. * Documentation updates. * Convert cond_resched_tasks_rcu_qs() from macro to static inline function. SRCU updates: * Add Rust helpers for SRCU. * Avoid losing queued work at cleanup_srcu_struct() time. Torture-test updates: * Preparation work for immediate RCU priority deboosting. * Test RCU readers from real interrupt handlers (as opposed to softirq). * Simplify code through use of cpumask_next_wrap(). * Improve diagnostic output with character task states. * Add rcutorture.nwriters parameter to allow lightweight stall testing, and rcutorture.stall_only to make doing so easier. * Test an RCU Tasks Trace grace period implying an RCU grace period. * Make RCU Tasks Trace torturing track reader batches. * Fix a data race, courtesy of KCSAN. * Plug a shuffle_tmp_mask memory leak on kthread spawn failure. --- include/trace/events/percpu.h | 137 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 137 insertions(+) create mode 100644 include/trace/events/percpu.h (limited to 'include/trace/events/percpu.h') diff --git a/include/trace/events/percpu.h b/include/trace/events/percpu.h new file mode 100644 index 000000000..5b8211ca8 --- /dev/null +++ b/include/trace/events/percpu.h @@ -0,0 +1,137 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM percpu + +#if !defined(_TRACE_PERCPU_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_PERCPU_H + +#include +#include + +TRACE_EVENT(percpu_alloc_percpu, + + TP_PROTO(unsigned long call_site, + bool reserved, bool is_atomic, size_t size, + size_t align, void *base_addr, int off, + void __percpu *ptr, size_t bytes_alloc, gfp_t gfp_flags), + + TP_ARGS(call_site, reserved, is_atomic, size, align, base_addr, off, + ptr, bytes_alloc, gfp_flags), + + TP_STRUCT__entry( + __field( unsigned long, call_site ) + __field( bool, reserved ) + __field( bool, is_atomic ) + __field( size_t, size ) + __field( size_t, align ) + __field( void *, base_addr ) + __field( int, off ) + __field( void __percpu *, ptr ) + __field( size_t, bytes_alloc ) + __field( unsigned long, gfp_flags ) + ), + TP_fast_assign( + __entry->call_site = call_site; + __entry->reserved = reserved; + __entry->is_atomic = is_atomic; + __entry->size = size; + __entry->align = align; + __entry->base_addr = base_addr; + __entry->off = off; + __entry->ptr = ptr; + __entry->bytes_alloc = bytes_alloc; + __entry->gfp_flags = (__force unsigned long)gfp_flags; + ), + + TP_printk("call_site=%pS reserved=%d is_atomic=%d size=%zu align=%zu base_addr=%p off=%d ptr=%p bytes_alloc=%zu gfp_flags=%s", + (void *)__entry->call_site, + __entry->reserved, __entry->is_atomic, + __entry->size, __entry->align, + __entry->base_addr, __entry->off, __entry->ptr, + __entry->bytes_alloc, show_gfp_flags(__entry->gfp_flags)) +); + +TRACE_EVENT(percpu_free_percpu, + + TP_PROTO(void *base_addr, int off, void __percpu *ptr), + + TP_ARGS(base_addr, off, ptr), + + TP_STRUCT__entry( + __field( void *, base_addr ) + __field( int, off ) + __field( void __percpu *, ptr ) + ), + + TP_fast_assign( + __entry->base_addr = base_addr; + __entry->off = off; + __entry->ptr = ptr; + ), + + TP_printk("base_addr=%p off=%d ptr=%p", + __entry->base_addr, __entry->off, __entry->ptr) +); + +TRACE_EVENT(percpu_alloc_percpu_fail, + + TP_PROTO(bool reserved, bool is_atomic, size_t size, size_t align), + + TP_ARGS(reserved, is_atomic, size, align), + + TP_STRUCT__entry( + __field( bool, reserved ) + __field( bool, is_atomic ) + __field( size_t, size ) + __field( size_t, align ) + ), + + TP_fast_assign( + __entry->reserved = reserved; + __entry->is_atomic = is_atomic; + __entry->size = size; + __entry->align = align; + ), + + TP_printk("reserved=%d is_atomic=%d size=%zu align=%zu", + __entry->reserved, __entry->is_atomic, + __entry->size, __entry->align) +); + +TRACE_EVENT(percpu_create_chunk, + + TP_PROTO(void *base_addr), + + TP_ARGS(base_addr), + + TP_STRUCT__entry( + __field( void *, base_addr ) + ), + + TP_fast_assign( + __entry->base_addr = base_addr; + ), + + TP_printk("base_addr=%p", __entry->base_addr) +); + +TRACE_EVENT(percpu_destroy_chunk, + + TP_PROTO(void *base_addr), + + TP_ARGS(base_addr), + + TP_STRUCT__entry( + __field( void *, base_addr ) + ), + + TP_fast_assign( + __entry->base_addr = base_addr; + ), + + TP_printk("base_addr=%p", __entry->base_addr) +); + +#endif /* _TRACE_PERCPU_H */ + +#include -- cgit v1.3.1